Door.



Patented July 15, [902. F. F. LOW.

DOOR.

(Application filed Apr. 22. 1901.)

3 Sheets-Sheet I.

(No Model.)

JNVENTOR.

am amgm W FkEoER/c 1? Law,

WITNESSES ATTORNEY-.9

35E iiEmms prrzns no. Piai'uu-rn'o" yasmusvou. me

Patented July {5, I902.

F. F. LOIW.

DOOR. {Applicatiun filed Apr. 22, 1901.)

3 Sheets-Sheet 2.

(No Model.)

, zfiwhzuus 11 W A l l 1 1 i' Flt- 6 WITNESSES A TTORNEYJ Patented luly l5, I902. F. F.- LOW.

DOOR.

[Application filed Apr. 22, 1901.

3 Sheets-Sheet 3.

(No Model.)

Anxhw s m N H k W 5 7 M m W i 1 1 4 a v: fi m :01. E M M .2 0 0k m .n 4 Mr: 7111/14d 111111111$1141116M I I u w I'll-.4111. 2 111111 11111 111 4111111 1 f WITNESSES.-

the sliding door on the swinging door.

UNITED STATES PATENT OFFICE.

FREDERIO F. LOW, OF BOSTON, MASSACHUSETTS.

DOOR.

SPECIFICATION forming part of Letters Patent No. 704,887, dated July 15, 1902.

Application filed April 22, 1901. Serial No. 56,878. (No model.)

T 0 a. whom, it 1nd concern:

Be it known that I, FnEDERIo F. Low, a citizen of the United States, residing at Boston, in the county of Sufifolk and State of Massachusetts, have invented a new and useful Improvement in Doors, of which the following is a specification, reference being had to the accompanying drawings, in which Figure 1 is an isometric view of my new door. Fig. 2 is a plan view of my new door, showing it in three diiferen't positionsopen, partly open, and closed. Fig. 3 is a sectional view on line A A, Fig. 2. Figs. 4., 5, 6, 7, and 8 illustrate details hereinafter referred to, and Fig. 9 shows a modification hereinafter described.

My invention relates to doors and similar structures made up of two or more members the rotation of one of which causes the other member to slide and fold itself with the rotary member.

The object of my invention is to provide a two-part door which will close a maximum width and yet require a minimum space when it is being opened and in its open position.

My invention consistsin the structure hereinafter described and claimed.

In the drawings illustrating the principle of my invention and theloest mode in which I have contemplated applying that principle, a is the swingingdoor, hinged at h to the upright or jamb-post c. The track (Z is fastened securely to the top of the swinging door a and projects out over the sliding door 6, (see Figs. 1 and 2,) which is supported thereon by the rollers f, journaled in the hangers g.

(See Fig. 3.) Secured to the upper part of the swinging door a is the rack h, and to the upper part of the sliding door 9 a similar rack (See Figs. 5, 6, 1, and 2.) Pivoted at j in the door-frame, Fig. 1, is the arm is, Fig. 8, which carries at its free end the pinion Z. This pinion Z meshes with the racks, h and i and is adapted to rotate about the pin m, by which it is secured to the arm is. To the lower part of the swinging door Ct is secured the track n, upon the flange 0 of which rides the grooved roller 13, journaled in the frame q, secured to the lower side of the sliding door 6. (See Fig. 3.)

In Fig. 9 I show another mode of hanging A frame 1" is secured to the sliding door 6 and carries agrooved foller s, which'rides on the flange t of the track it, secured to the swinging door a. v

The operation ofthe various parts is as follows: \Vhen the swinging door a is pushed inward or opened, a strain is brought upon the arm is, as will be made evident by a glance at Figs. 1 and 2, which show that the pivotal points of the swinging door a and the arm is are not coincident. By reason of the eccentricity between the swinging door a and arm 70 the rack it travels so as to-cause the pinion Z to rotate, and the rotation of thepinionl causes the movement of the rack 11, and thereby of the sliding door e, to which the rack i is socured. Hencethe opening of the door is accomplished by swinging inward the swinging needed to open or close the door.

Among the uses to which such a door may be put are the following: doors forstreet-cars,

in which only a limited space is available;

doors for fire-engine houses, in which space in front is valuable for storing the apparatus;

doors for car-houses, in which proper clearance for the cars must be obtained to permit their passage; doors for schools and other public buildings, stores, and dwellings, where stairs or other obstructions prevent the swinging of awide door, and doors in vestibules of public buildings, in which the doors stand side to side when closed and back to myself to the exact structure herein shown, as a many modifications maybe made therein without departing from the spirit of my invention. For example, the tracks may be hinged to the jamb-post, the racks h may be secured to the track-frame, and other means may be devised for transmitting motion from the swinging door to the sliding door.

What I claim is 1. In combination in a door, a support; a pivotal member; a slidable member; a pair of coacting racks, one for said pivotal member and the other for said slidable member; and a toothedmechanism which engages and travels over one of said racks and communicates rectilinear motion to the other of said racks.

2. In combination in a door, a support; a pivotal member; a slidable member; a pair of coacting racks, one for said pivotal member and the other for said slidable member; and a pinion which is mounted to swing about said support and which intermeshes with said racks.

I at its free end.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Boston, Massachusetts, this 20th day of April, A. D. 1901.

FREDERIC F. LOW.

YVitnesses:

JOSIAH DEARBORN, JAMES HAMILTON. 

